01:220:102 Lecture Notes - Lecture 13: Marginal Cost, Longrun, Average Variable Cost
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Average cost: total cost divided by the quantity of output produced. Tells the producer the average cost of producing one unit of a good or service. U-shaped average total cost curve falls at low levels of output, then rises at higher levels. Average fixed cost: the fixed cost per unit of output. Average variable cost: the variable cost per unit of output. Average fixed cost falls as output increases because the cost is spread among more units. Average variable cost increases as output increases because of the diminishing returns effect. Average total cost is in a u shape because afc and avc go in opposite directions as output increases. The spreading effect: the larger the output, the greater the quantity of output over which fixed cost is spread, leading to lower average fixed cost. The diminishing returns effect: the larger the output, the greater the amount of variable input required to produce additional units, leading to higher average variable cost.